Review of the medical charts and the surgical reports revealed the patients’ demographic data, their medical history prior and after the surgical Partial mastoid obliteration We conducted a retrospective chart review of patients who had undergone CI subsequent to a canal wall down mastoidectomy with PMO or EAC overclosure as two-stage procedures between 20 at a single tertiary referral center (Department of Otolaryngology, Head & Neck Surgery, University Hospital Cologne) following the same surgical principles. In this study, we evaluate the results of CI subsequent to PMO with bone paté and cartilage plates compared to the overclosure of the EAC. Consequently, we used it to obliterate and thus prepare the so-called radical mastoid cavity after CWD for CI in a two stage procedure. The partial mastoid obliteration (PMO) with bone paté and conchal cartilage has proven to be a safe and reliable technique in reconstructive middle ear surgery for patients with CWD mastoidectomy. However, overclosure of the EAC does involve several complications, such as postoperative infections, meningitis due to masked cavity infection because of residual or recurrent cholesteatoma but also fat necrosis and dehiscences of the meatoplasties, ,,. In this regard the EAC overclosure is considered as a safe procedure among various surgical techniques proposed, ,, ,,. As a consequence, there is an increased hazard for labyrinthitis, meningitis and electrode array extrusion into the external auditory canal (EAC) through the soft tissue cover of the mastoid cavity,. However, despite the anatomical challenges the otosurgeon is confronted with a challenging operating field, especially in the case of a persistent or recurrent inflammation due to the underlying inflammatory middle ear disease such as chronic otitis media (COM) or cholesteatoma.
Cochlear implantation (CI) after canal wall down (CWD) mastoidectomy presents a particular surgical challenge.
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